Hmm...that's a crap shoot really. She may, she may not. It's really impossible to pick a dog at that age and be certain they can/should be bred down the line. You could take a chance and *hope* she ends up being what you want, but you may be setting yourself up for dissapointment if she isn't. How old is your male? If you are dead set on breeding, I would give him time to mature COMPLETELY, have him evaluated and then search for a female that will compliment him. You may be better off searching for a slightly older girl--easier to ascertain what qualities she is developing.
In the meantime, you need to find a mentor who is well seasoned with Yorkies who can help guide you and teach you what to look for.